EP2692407B1 - Structure étanche en nid d'abeilles - Google Patents

Structure étanche en nid d'abeilles Download PDF

Info

Publication number
EP2692407B1
EP2692407B1 EP12765116.4A EP12765116A EP2692407B1 EP 2692407 B1 EP2692407 B1 EP 2692407B1 EP 12765116 A EP12765116 A EP 12765116A EP 2692407 B1 EP2692407 B1 EP 2692407B1
Authority
EP
European Patent Office
Prior art keywords
cell
honeycomb structure
reinforced
cells
outlet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP12765116.4A
Other languages
German (de)
English (en)
Other versions
EP2692407A1 (fr
EP2692407A4 (fr
Inventor
Tetsuo Toyoshima
Akira Takahashi
Yuichi HAMAZAKI
Jung Min Seo
Won Soon Park
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NGK Insulators Ltd
Hyundai Motor Co
Kia Corp
Original Assignee
NGK Insulators Ltd
Hyundai Motor Co
Kia Motors Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NGK Insulators Ltd, Hyundai Motor Co, Kia Motors Corp filed Critical NGK Insulators Ltd
Publication of EP2692407A1 publication Critical patent/EP2692407A1/fr
Publication of EP2692407A4 publication Critical patent/EP2692407A4/fr
Application granted granted Critical
Publication of EP2692407B1 publication Critical patent/EP2692407B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2418—Honeycomb filters
    • B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
    • B01D46/247—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure of the cells
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2418—Honeycomb filters
    • B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
    • B01D46/2474—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure of the walls along the length of the honeycomb
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2418—Honeycomb filters
    • B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
    • B01D46/2482—Thickness, height, width, length or diameter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2418—Honeycomb filters
    • B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
    • B01D46/2484—Cell density, area or aspect ratio
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2418—Honeycomb filters
    • B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
    • B01D46/2486—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure characterised by the shapes or configurations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/0006—Honeycomb structures
    • C04B38/0009—Honeycomb structures characterised by features relating to the cell walls, e.g. wall thickness or distribution of pores in the walls
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/0006—Honeycomb structures
    • C04B38/0012—Honeycomb structures characterised by the material used for sealing or plugging (some of) the channels of the honeycombs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/022—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/022—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
    • F01N3/0222—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous the structure being monolithic, e.g. honeycombs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
    • F01N3/2825—Ceramics
    • F01N3/2828—Ceramic multi-channel monoliths, e.g. honeycombs
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00793—Uses not provided for elsewhere in C04B2111/00 as filters or diaphragms
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/349—Clays, e.g. bentonites, smectites such as montmorillonite, vermiculites or kaolines, e.g. illite, talc or sepiolite
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
    • C04B2235/602—Making the green bodies or pre-forms by moulding
    • C04B2235/6021—Extrusion moulding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/30—Honeycomb supports characterised by their structural details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/60—Discontinuous, uneven properties of filter material, e.g. different material thickness along the longitudinal direction; Higher filter capacity upstream than downstream in same housing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24149—Honeycomb-like

Definitions

  • the present invention relates to a sealed honeycomb structure according to the preamble of claim 1. More particularly, the present invention relates to a sealed honeycomb structure which can suppress increase of pressure loss and improve durability favorably.
  • PM particulate matter
  • DPF diesel particulate filter
  • honeycomb structure having a porous wall dividedly forming a plurality of cells that will be channels of fluid (exhaust gas and purified gas) has been used as the DPF.
  • a honeycomb structure is used as a sealed honeycomb structure (honeycomb filter) by mounting sealing portions at openings of predetermined cells (inlet cell) disposed on an end surface of an outlet side of fluid (purified gas) and at openings of remaining cells (outlet cell) disposed on an end surface of an inlet side of fluid (exhaust gas).
  • the particulate matter in the exhaust gas is trapped at a wall when the exhaust gas passes through the wall and the purified gas from which the particulate matter is eliminated flows out from the outlet cell according to the sealed honeycomb structure.
  • a ceramic honeycomb structure where a cross-sectional shape of some channels (cells) vertical to an axial direction is such that R portions of arc shape are formed at diagonally confronting corner portions is developed (e.g., please refer to patent document 1).
  • a honeycomb structure porous where fillets are formed at corner portions of cells dividedly formed by porous walls so as to reinforce the cells is also developed (e.g., please refer to patent document 2). According to such honeycomb structures, thickness of an intersecting part of the walls increases, and thereby, mechanical strength (i.e., durability) may be improved.
  • Document JP 2010 221159 A discloses an honeycomb filter according to the preamble of claim 1.
  • Said honeycomb filter has porous partition walls that divides the honeycomb filter to form a plurality of cells.
  • the honeycomb filter includes inlet (inflow) cells and outlet (outflow) cells. At least one outlet cell can have a shape in which the corner parts are formed into a circular arc shape.
  • Document JP 2010 131586 A discloses a honeycomb filter with partition walls for separating collection cells and discharge cells from each other.
  • the collection cell can have a flat surface and the discharge cell can have a concave curved surface.
  • mass of the sealed honeycomb structure also increases by forming the reinforcing part, forming the reinforcing part excessively may cause deterioration of performance of the sealed honeycomb structure. If the mass of the sealed honeycomb structure, for example, increases, a time for reaching a required temperature for purifying the exhaust gas also increases. Therefore, purifying performance of the exhaust gas may be deteriorated. In addition, a temperature of the exhaust gas may be raised so as to keep the purifying performance. In this case, fuel consumption of an internal combustion engine of vehicles may be deteriorated.
  • the reinforcing part is formed so as to improve strength of the honeycomb structure according to the conventional honeycomb structures.
  • durability may be improved by forming the reinforcing part but other characteristics of the filter such as the pressure loss or the purifying performance may be deteriorated.
  • improvement of strength and increase of the pressure loss in the honeycomb structure are regarded to be incompatible. Therefore, it is very difficult to obtain both of them.
  • the present invention has been made in an effort to provide a sealed honeycomb structure having advantages of suppressing increase of pressure loss by sufficiently securing a volume of a cell (inlet cell) into which fluid flows and improving durability favorably.
  • the present invention provides a sealed honeycomb structure according to claim 1 . Further advantageous embodiments are set out in the dependent claims.
  • At least one cell among “outlet cells where an end surface of an outlet side is open and an end surface of an inlet side is sealed” is a reinforced cell where a reinforced part for reinforcing the outlet cell is formed at at least one corner portion at which walls on a cross-section vertical to an extending direction of the cell cross each other, and an "inlet cell where the end surface of the inlet side is open and the end surface of the outlet side is sealed” has a reinforced part for reinforcing the inlet cell formed at at least one corner portion at which walls on the cross-section vertical to the extending direction of the cell cross each other wherein the number of the corner portions reinforcing the inlet cells is smaller than the number of the corner portions reinforcing the outlet cells, or the inlet cell is a non-reinforced cell where the reinforced part is not formed at all the corner portions at which the walls on the cross-section vertical to the extending direction of the cell cross each other.
  • volume and opening area of the inlet cell where the reinforced part is not formed i.e., non-reinforced cell
  • durability of the sealed honeycomb structure may be improved favorably because the reinforced part is formed at at least one corner portion of the outlet cell which has smaller influence on pressure loss than the inlet cell does. Therefore, mechanical strength of the sealed honeycomb structure may be excellent.
  • occupying volume of the reinforcing part in the channel according to the sealed honeycomb structure of the present exemplary embodiment is less than half of that according to a conventional honeycomb structure having the inlet cells and the outlet cells where the reinforcing part is formed.
  • durability of the honeycomb structure can be improved more than volume ratio of the reinforcing part.
  • the number of the reinforced parts formed at the outlet cells at which maximum thermal stress occurs in the sealed honeycomb structure is greater than the number of the reinforced parts formed at the inlet cells, or only the outlet cells are reinforced, excess increase in mass of the sealed honeycomb structure may be suppressed.
  • the sealed honeycomb structure is easily heated and degradation of purifying performance of exhaust gas may be suppressed favorably.
  • temperature of the sealed honeycomb structure is controlled by temperature of the exhaust gas, deterioration of fuel economy of the internal combustion engine may be suppressed because the sealed honeycomb structure is easily heated.
  • the sealed honeycomb structure of the present invention improvement of durability of the honeycomb structure and suppression of increase of pressure loss that were regarded as trade-off relation may be satisfied.
  • degradation of purifying performance or fuel consumption of the internal combustion engine may be suppressed.
  • the sealed honeycomb structure according to the present exemplary embodiment may improve strength of the honeycomb structure without influence on the increase of the pressure loss, cleaning period of the ash, and replacement period of a filter of purifying the exhaust gas (for example, DPF) after the ash is deposited.
  • a filter of purifying the exhaust gas for example, DPF
  • one exemplary type of a sealed honeycomb structure is a sealed honeycomb structure 100 including "a honeycomb structure 4 having porous walls 1 dividedly forming a plurality of cells 2 being fluid channels extending from an end surface 11 of an inlet side to an end surface 12 of an outlet side", "an outlet side sealing portion 5b mounted at openings of predetermined cells in the end surface 12 of the outlet side so as to form inlet cells 2a where the end surface 11 of the inlet side is open and the end surface 12 of the outlet side is sealed", and “an inlet side sealing portion 5a mounted at openings of remaining cells in the end surface 11 of the inlet side so as to form outlet cells 2b where the end surface 12 of the outlet side is open and the end surface 11 of the inlet side is sealed".
  • At least one cell among the outlet cells 2b is a reinforced cell 22 where a reinforcing part 6 for reinforcing the outlet cell 2b is formed at at least one corner portion 21a at which the walls 1 on a cross-section vertical to an extending direction of the cell 2 cross each other.
  • the inlet cell 2a is a non-reinforced cell 23 where the reinforcing part 6 is not formed at all the corner portions 21 at which the walls 1 on the cross-section vertical to the extending direction of the cell 2 cross each other.
  • the reinforcing part 6 is not formed at the inlet cell 2a into which the fluid flows, and the cells are dividedly formed by the walls 1 having substantially uniform thickness according to the sealed honeycomb structure 100 of the present exemplary embodiment. All the inlet cells 2a formed in the sealed honeycomb structure 100 are the non-reinforced cells 23.
  • the reinforcing part 6 is formed at at least one corner portion 21a at which the walls 1 cross in at least one cell among the outlet cells 2b, and some cells among the outlet cells 2b are the reinforced cells 22 with the corner portion 21a being reinforced.
  • all the outlet cells 2b may be the reinforced cells 22, or some cells among the outlet cells 2b are the reinforced cells 22 and the outlet cells 2b other than the reinforced cells 22, the same as the inlet cells 2a, may be the non-reinforced cells where the reinforcing part 6 is not formed according to the sealed honeycomb structure of the present exemplary embodiment.
  • FIG. 1 is a perspective view of a sealed honeycomb structure according to an exemplary embodiment of the present invention.
  • FIG. 2 is a schematic diagram of a sealed honeycomb structure with an end surface of an inlet side being enlarged according to an exemplary embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a sealed honeycomb structure with an end surface of an outlet side being a sealed honeycomb structure according to an exemplary embodiment.
  • FIG. 4 is a schematic diagram of an enlarged cross-section vertical to an extending direction of a cell in a sealed honeycomb structure according to an exemplary embodiment.
  • FIG. 5 is a schematic diagram of a cross-section parallel to an extending direction of a cell in a sealed honeycomb structure according to an exemplary embodiment.
  • the sealed honeycomb structure 100 can sufficiently secure volume of the inlet cells 2a (i.e., non-reinforced cells 23) where the reinforcing part 6 is not formed and opening area (filter area) of the inlet cells 2a. Therefore, increase in pressure loss of the sealed honeycomb structure can be suppressed favorably. Meanwhile, durability of the sealed honeycomb structure 100 may be improved by forming the reinforcing part 6 at at least one corner portion 21a at which the walls 1 cross in the outlet cells 2b that have less influence on the pressure loss than the inlet cells 2a do. Therefore, mechanical strength of the sealed honeycomb structure 100 may be enhanced.
  • occupying volume of the reinforcing part 6 in the channel (cell 2) according to the sealed honeycomb structure 100 of the present exemplary embodiment is less than half of that according to a conventional honeycomb structure having the inlet cells and the outlet cells where the reinforcing part is formed.
  • durability of the honeycomb structure can be improved more than volume ratio of the reinforcing part 6.
  • the sealed honeycomb structure 100 may be easily heated and degradation in performance of purifying the exhaust gas may be suppressed favorably in a case that the sealed honeycomb structure 100 is mounted at an exhaust gas channel of an internal combustion engine.
  • the temperature of the sealed honeycomb structure 100 is controlled by the temperature of the exhaust gas, deterioration in fuel consumption of the internal combustion engine of the vehicle may be suppressed because the sealed honeycomb structure 100 can be easily heated.
  • the sealed honeycomb structure 100 may improve strength of the honeycomb structure 4 without influence on the increase of the pressure loss, cleaning period of the ash, and replacement period of a filter of purifying the exhaust gas (for example, DPF) after the ash is deposited.
  • a filter of purifying the exhaust gas for example, DPF
  • the "reinforcing part” means a part disposed at the corner portion at which the walls dividedly forming the cells cross each other and reinforcing strength (durability) of the walls that are frame parts of the honeycomb structure.
  • the "reinforcing part” includes separate members (e.g., reinforcing members such as concave parts or beams) additionally mounted at the corner portion where the walls cross in order to reinforce the corner portion.
  • the "reinforcing part” may be any corner portion formed in advance to have a surface of an R shape or a C shape that is different from other corner portions (for example, the corner portions of the non-reinforced cell or the corner portions of the reinforced cell at which the reinforcing part is not formed).
  • the reinforcing part includes the separate members additionally mounted at the corner portion so as to reinforce the corner portion
  • the reinforcing part having arbitrary shape may be mounted at a predetermined corner portion when manufacturing the honeycomb structure. Therefore, the reinforced cells of various shapes can be formed regardless of a shape of a mold for forming the honeycomb structure. Meanwhile, if the reinforcing part is the part formed thick at the corner portion, the reinforcing part can be formed at the predetermined outlet cell (reinforced cell) when manufacturing the honeycomb structure (in further detail, when manufacturing a molded article of the honeycomb). Therefore, formation of the reinforcing part may be simplified.
  • the "reinforced cell” is a cell where at least one corner portion among the corner portions formed at an external circumference of the cell is reinforced by the "reinforcing part". That is, the “reinforced cell” may include a reinforced corner portion at which the reinforcing part is formed and a non-reinforced corner portion at which the reinforcing part is not formed. In addition, the “reinforced cell” may be the cell, all the corner portions of which are reinforced by the reinforcing parts (i.e., all the corner portions are the reinforced corner portions).
  • the reinforced cell having the reinforced corner portion and the non-reinforced corner portion may suppress reduction in the volume of the outlet cell and may further suppress the increase of the pressure loss.
  • the reinforced cell, all the corner portions of which are the reinforced corner portions may improve durability of the sealed honeycomb structure favorably.
  • a virtual line is drawn from a mass center of the honeycomb structure (a mass center of the cross-section vertical to the extending direction of the cell) to a vertex of the corner portion of the cell and the virtual line is elongated radially toward an external circumference of the honeycomb structure, "the corner portions, two sides of which are disposed across the virtual line", are formed to be the reinforced corner portions, and the other corner portions (that is, the corner portion, two sides of which are not disposed across the virtual line are formed to be the non-reinforced corner portions in a case that the reinforced cells, for example, has the reinforced corner portion and the non-reinforced corner portion.
  • a shape of the honeycomb structure 4 is not limited but may be a cylindrical shape, a tubular shape having an oval end surface, and a polygon pillar shape having a polygon end surface such as "square, rectangle, triangle, pentagon, hexagon, octagon, and so on".
  • the honeycomb structure 4 having the cylindrical shape is exemplarily shown in FIG. 1 to FIG. 5 .
  • the honeycomb structure 4 shown in FIG. 1 to FIG. 5 has an external wall 3, but the honeycomb structure 4 may not have the external wall 3. It is preferable that the external wall 3 is formed together with the walls when a molded article of the honeycomb is extruded in manufacturing process of the honeycomb structure.
  • the external wall 3 may be formed by spaying ceramic material to the external circumference of the honeycomb structure.
  • the honeycomb structure used in the sealed honeycomb structure according to the present exemplary embodiment may include a plurality of honeycomb segments 8 provided with the porous walls 1 dividedly forming the plurality of cells 2 being the fluid channels extending from the end surface 11 of the inlet side to the end surface 12 of the outlet side, and fences 7 arranged to enclose the walls 1. That is, the honeycomb structure 4a may be formed by bonding the plurality of honeycomb segments 8 in a state that side surfaces of the plurality of honeycomb segments 8 are contactedly disposed.
  • the sealed honeycomb structure 110 shown in FIG. 6 includes the outlet side sealing portion 5b that is mounted at the openings of the predetermined cells in the end surface 12 of the outlet side of each honeycomb segment 8 and forms the inlet cells 2a where the end surface 11 of the inlet side is open and the end surface 12 of the outlet side is sealed, and the inlet side sealing portion 5a that is mounted at the openings of the remaining cells in the end surface 11 of the inlet side of each honeycomb segment 8 and forms the outlet cells where the end surface 12 of the outlet side is open and the end surface 11 of the inlet side is sealed.
  • FIG. 6 is a perspective view of a sealed honeycomb structure according to another exemplary embodiment.
  • the sealed honeycomb structure 110 by using the honeycomb structure 4a of segment type shown in FIG. 6 are the same as those of the sealed honeycomb structure 100 by using the honeycomb structure 4 of integrated type shown in FIG. 1 to FIG. 5 . That is, at least one cell among the outlet cells 2b may be the reinforced cell where the reinforcing part 6 for reinforcing the outlet cell 2b is formed at at least one corner portion 21a at which the walls 1 cross, and the inlet cells 2a may be the non-reinforced cells where none of the reinforcing parts is formed at all the corner portions 21 at which the walls 1 cross (for example, please refer to FIG. 4 ) in the sealed honeycomb structure 110 shown in FIG. 6 . Therefore, the same effects as those of the sealed honeycomb structure 100 shown in FIG. 1 to FIG. 5 can be achieved by the sealed honeycomb structure 110 shown in FIG. 6 .
  • At least one of the outlet cells of the honeycomb segments 8 may be the reinforced cell, or all the outlet cells of the honeycomb segments 8 may be the reinforced cells. It is exemplified in FIG. 6 that all the outlet cells of the honeycomb segments 8 are the reinforced cells.
  • the reinforcing parts of the sealed honeycomb structure 110 shown in FIG. 6 are the same as those 6 of the sealed honeycomb structure 100 shown in FIG. 1 to FIG. 5 .
  • all the inlet cells 2a are the non-reinforced cells 23 in the above description, but the reinforced part for reinforcing the inlet cell 2a may be formed at at least one corner portion 21 of the inlet cell 2a at which the walls 1 on the cross-section vertical to the extending direction of the cell 2 cross each other.
  • the number of the corner portions reinforcing the inlet cell 2a may be smaller than the number of the corner portions reinforcing the outlet cell 2b. Effects of this exemplary embodiment are almost the same as those of the exemplary embodiments where all the inlet cells 2a are the non-reinforced cells 23.
  • the “inlet cell” is the cell where the outlet side sealing portion is mounted at the opening of the cell formed on the end surface of the outlet side.
  • the fluid such as the exhaust gas is flowed into the opening of the inlet cell formed on the end surface of the inlet side.
  • the “outlet cell” is the cell where the inlet side sealing portion is mounted at the opening of the cell formed on the end surface of the inlet side.
  • the fluid such as the exhaust gas cannot be directly flowed into the outlet cell.
  • the fluid flows into the outlet cell after the fluid flowing into the inlet cell passes through the walls, and is exhausted from the opening of the outlet cell formed on the end surface of the outlet side. When the fluid moves from the inlet cell to the outlet cell, the particulate matter in the fluid is trapped by the porous wall.
  • the inlet cell and the outlet cell i.e., the arrangement of the outlet side sealing portion and the inlet side sealing portion is not specifically restricted.
  • the inlet cell and the outlet cell may be disposed alternately across the wall.
  • some of the inlet cells or some of the outlet cells are gathered and disposed at any region on the end surface of the honeycomb structure.
  • the inlet cell and the outlet cell are disposed alternately across the wall.
  • a shape of the cell (the opening shape on the cross-section vertical to the extending direction of the cell) is not specifically restricted.
  • the shape of the cell may be a polygon shape such as triangle, quadrangle, hexagon, octagon, and so on.
  • the shape of the cell where the reinforcing part is formed means a shape of the cell without the reinforcing part.
  • the cross-sectional opening shape of the inlet cell vertical to the extending direction of the cell (hereinafter, it will be simply called “opening shape of inlet cell”) may be the same as that of the outlet cell without the reinforcing part vertical to the extending direction of the cell (hereinafter, it will be simply called “opening shape of outlet cell”).
  • the opening shape of the inlet cell is the same as that of the outlet cell
  • the opening shape may be, for example, quadrangle, hexagon, octagon, and so on.
  • cross-sectional thickness of the wall constituting the honeycomb structure vertical to the extending direction of the cell is basically uniform according to the sealed honeycomb structure of the present exemplary embodiment.
  • the "basically uniform” means that the thickness of the wall is uniform except a case that the thickness of the wall is slightly irregular due to a deformation occurring when forming the sealed honeycomb structure. That is, the cross-sectional thickness of the wall is not changed intentionally, and is substantially uniform according to the sealed honeycomb structure of the present exemplary embodiment. For example, if slits of the mold for extruding the honeycomb structure are manufactured by a slicer, the uniform thickness of the wall is achieved. In addition, if the thickness of a portion (particularly, corner portion) of the wall is thicker than that of the other portion of the wall, it is regarded that the reinforcing part is formed at the portion according to the sealed honeycomb structure of the present exemplary embodiment.
  • the thickness of the wall may be 127 to 508 ⁇ m, may preferably be 152 to 483 ⁇ m, and may further preferably be 152 to 445 ⁇ m. If the thickness of the wall is thinner than 127 ⁇ m, strength of the sealed honeycomb structure may be deteriorated. If the thickness of the wall is thicker than 508 ⁇ m, initial pressure loss of the sealed honeycomb structure may increase.
  • Porosity of the wall may be 25 to 75%, may preferably be 30 to 65%, and may further preferably be 35 to 65%. If the porosity is lower than 25%, the initial pressure loss of the sealed honeycomb structure may increase. If the porosity is higher than 75%, the strength of the sealed honeycomb structure may be deteriorated. The porosity is detected by a mercury porosimeter.
  • Average diameter of the pore of the wall may be 6 to 35 ⁇ m, may preferably be 7 to 30 ⁇ m, and may further preferably be 7 to 25 ⁇ m. If the average diameter of the pore is smaller than 6 ⁇ m, the initial pressure loss of the sealed honeycomb structure may increase. If the average diameter of the pore is larger than 35 ⁇ m, the strength of the sealed honeycomb structure may be deteriorated. The average diameter of the pore is detected by the mercury porosimeter.
  • Cell density of the honeycomb structure is not limited, but may be 15 to 80/cm 2 and may preferably be 15 to 62 /cm 2 . If the cell density is lower than 15/cm 2 , the strength of the sealed honeycomb structure may be deteriorated. If the cell density is higher than 80/cm 2 , the cross-sectional area of the cell (area of the cross-section vertical to the extending direction of the cell) decreases, and thereby the pressure loss may increase.
  • Material of the wall may be selected from the group consisting of ceramic, cordierite, silicon carbide, silicon-silicon carbide family composite material, mullite, alumina, aluminum titanate, silicon nitride, silicon carbide-cordierite family composite material, and combinations thereof having superior strength and thermal resistance.
  • the cordierite among them is preferable.
  • Material of the reinforcing part is not limited. Ceramic and preferably the above-mentioned material for the wall may be used as the material of the reinforcing part. According to sealed honeycomb structure of the present exemplary embodiment, it is preferable that thermal expansion coefficient of the wall is the same value as or similar value to that of the reinforcing part. In addition, the material of the wall may be the same as that of the reinforcing part. Thereby, even though thermal stress is applied to the sealed honeycomb structure, separation of the reinforcing part from the honeycomb structure or breakage of a bonding portion of the reinforcing part and the wall may be prevented. In addition, if the wall and the reinforcing part are integrally formed, the material of the wall is the same as that of the reinforcing part.
  • Size of the reinforcing part may not be limited.
  • the reinforcing part has such a size that the reinforcing part can be mounted at at least one corner portion of the walls dividedly forming the outlet cells and does not block the opening portion of the outlet cell completely. If a considerable portion of the opening portion of the outlet cell is blocked by the reinforcing part, the pressure loss may increase.
  • FIG. 7 is a schematic diagram of an enlarged cross-section vertical to an extending direction of a cell in a sealed honeycomb structure according to an exemplary embodiment of the present invention.
  • the ratio (L/T) of "the intersecting distance L of the intersecting part of the walls (hereinafter, it will be called the “intersecting distance L of the intersecting part of the walls”) that is the distance from the surface of the reinforcing part 6 of the reinforced cell 22 to the surface of another cell disposed across the intersecting point of the walls 1 dividedly forming the reinforced cells 22" to the "average thickness T of the wall 1 except the reinforcing part 6 (hereinafter, it will be called the “average thickness T of the wall 1")" will be described. As shown in FIG.
  • both of the reinforced cell 22 having the reinforced part 6x and another cell disposed across the intersecting point of the wall 1 are the reinforced cells 22.
  • the reinforced cell 22 having no reinforced part at the corner portion of the wall according to, for example, the position of the reinforced part 6x may exist.
  • the "ratio (L/T)" can be calculated by the above-described method.
  • the ratio (L/T) of the "intersecting distance L of the intersecting part of the walls" to the "average thickness T of the wall 1" is smaller than 1.5, improvement of the durability due to the reinforced parts may not be sufficiently secured. Meanwhile, if the ratio (L/T) of the "intersecting distance L of the intersecting part of the walls” to the "average thickness T of the wall 1" is larger than 9.3, the opening area of the reinforced cell 22 may be excessively reduced, and thereby the pressure loss may increase excessively. In addition, even though the ratio (L/T) is greater than 9.3, the durability may not improve further and increase ratio of the pressure loss may be great. Meanwhile, the ratio (L/T) may preferably be 1.5 to 8 and may further preferably be 1.5 to 7.
  • the non-reinforced cell may be a cell where the reinforced part is not formed at the corner portion at which the walls cross according to the honeycomb structure of the present exemplary embodiment.
  • the corner portion where the reinforced part is not formed may be formed to be slightly thicker than the other portions due to abrasion of the mold for extruding the honeycomb structure. Therefore, if the ratio (L/T) is smaller than 1.5, it is to be understood that the reinforced part is not formed at the corner portion according to the honeycomb structure of the present exemplary embodiment.
  • the ratio (L/T) is about 1.41.
  • a cross-sectional area of each reinforced part may occupy 0.05 to 20% of a cross-sectional area of the opening portion without the reinforced part vertical to the extending direction of the cell. If the cross-sectional area of the reinforced part is smaller than 0.05% of the cross-sectional area of the opening portion, reinforcing effects of the reinforced part cannot be sufficiently secured. In addition, if the cross-sectional area of the reinforced part is larger than 20% of the cross-sectional area of the opening portion, for example, the reinforced parts are formed at four corner portions of a quadrangular cell, the opening area of the reinforced cell is very small and the pressure loss of the sealed honeycomb structure may increase. Meanwhile, the cross-sectional area of each reinforced part may preferably occupy 0.1 to 12% and may further preferably 0.4 to 5% of the cross-sectional area of the opening portion without the reinforced part vertical to the extending direction of the cell.
  • each reinforced part may be formed at an entire region from the end surface of the inlet side to the end surface of the outlet side of the reinforced cell. Thereby, entire durability of the sealed honeycomb structure in a length direction may be improved favorably.
  • the reinforced part described above is formed at at least one cell among the outlet cells, at least one corner portion of the cell.
  • a ratio of a total area of the reinforced parts (summation of all the area of the reinforcement parts) to a total opening area (summation of all the opening area) of the outlet cells may be 0.1 to 22%, may preferably be 0.1 to 15%, and may further preferably be 0.1 to 11%.
  • the "total opening area of the outlet cells” means the summation of the opening areas of all the outlet cells regardless that the outlet cells are the reinforced cell or the non-reinforced cell
  • the "total area of the reinforced parts” means the summation of the occupying area of all the reinforced parts formed in the sealed honeycomb structure of the present exemplary embodiment.
  • the cross-sectional shape of the cell 2 is square and the outlet cells 2b within a narrow angle range such as 10 to 60° (for example, between a line Q and a line R in FIG. 8 ) with respect to a diagonal P (more particularly, extending line of the diagonal) of the cell perpendicular to the exterior circumference of the honeycomb structure are the reinforced cells 22 (that is, the sealed honeycomb structure 120 exemplarily shown in FIG. 8 ).
  • the durability of the sealed honeycomb structure 120 may be improved favorably.
  • FIG. 8 is a schematic diagram of an end surface of an outlet side in a sealed honeycomb structure according to other exemplary embodiment of the present invention.
  • constituent elements of the sealed honeycomb structure 120 shown in the FIG. 8 which are the same as those of the sealed honeycomb structure 100 shown in FIG. 1 to FIG. 5 , will be described by denoting the same reference numerals thereto.
  • a manufacturing method of the sealed honeycomb structure according to the present exemplary embodiment will be described.
  • a body for manufacturing the honeycomb structure is blended and is formed to manufacture the molded article of the honeycomb (forming process). It is preferable that the reinforced parts are formed at at least part of the cells which will be the outlet cells of the sealed honeycomb structure so as to form the reinforced molded article of the honeycomb in this forming process.
  • the reinforced parts may be formed in any one of the molded article of honeycomb, a honeycomb dried article obtained by drying the molded article of honeycomb or the honeycomb structure obtained by burning the honeycomb dried article. Detailed method will be described in detail when explaining each process.
  • the end surface of the inlet side and the end surface of the outlet side in the sealed honeycomb structure are determined when manufacturing the molded article of the honeycomb. Since shapes of the cells at the end surface of the inlet side and the end surface of the outlet side (that is, the inlet cells and the outlet cells) differ from each other (i.e., whether the reinforced parts exist or not) according to the sealed honeycomb structure of the present exemplary embodiment, directivity of the molded article of the honeycomb having the pillar shape is preferably predetermined.
  • the obtained molded article of the honeycomb (or the honeycomb dried article that is dried by demands) is burnt to manufacture the honeycomb structure (manufacturing process of the honeycomb structure). If the reinforced parts are not formed in the forming process, the reinforced parts are formed at a at least part of the cells which will be the outlet cells or the outlet cells and the inlet cells before or after burning.
  • the openings of the predetermined cells at the end surface of the inlet side and the openings of the remaining cells at the end surface of the outlet side in the molded article of the honeycomb are sealed so as to form the inlet side sealing portion and the outlet side sealing portion (sealing process).
  • the sealed honeycomb structure of the present exemplar embodiment can be manufactured.
  • the molded article of honeycomb having the plurality of cells that will be fluid channels is dividedly formed by forming ceramic mold material containing ceramic material in the forming process.
  • the ceramic material contained in the ceramic mold material may be selected from the group consisting of cordierite material, cordierite, mullite, alumina, titania, carbonization silicon and aluminum titanate, may preferably be selected from the group consisting of cordierite material, cordierite, mullite, alumina, titania, carbonization silicon and aluminum titanate, and may further preferably be selected from the group consisting of cordierite material, cordierite, mullite, alumina, titania, carbonization silicon and aluminum titanate.
  • the cordierite material means the ceramic material, chemical composition of which includes silica of 42 to 56 mass%, alumina of 30 to 45 mass%, and magnesia of 12 to 16mass%. The cordierite material is burnt to become cordierite.
  • the ceramic mold material may be made by compounding the ceramic material with dispersion medium, organic binder, inorganic binder, pore-forming material, and surfactant and so on. Composition ratio of each material is not limited and may be set according to structure and material of the honeycomb structure.
  • forming material is kneaded to obtain the body and the obtained body is molded into a honeycomb shape.
  • a method of obtaining the body by kneading the forming material is not limited, and, for example, a kneader or a vacuum deairing pugmill may be used to obtain the body.
  • a method of forming the molded article of the honeycomb by molding the body is not limited, and conventional forming methods such as extrusion molding or injection molding may be used.
  • the molded article of the honeycomb may be extruded by using the mold having a target cell shape, a target wall thickness, and a target cell density. Hard metal that is hard to be worn out is preferably used as material of the mold.
  • the mold for forming the honeycomb structure may have slit shape adapted to selectively form the cells provided with the reinforced parts (reinforced cell) and the cells not provided with the reinforced parts (non-reinforced cell).
  • such the mold includes a mold base having two surfaces.
  • the slits of the honeycomb shape at one surface of the mold base are formed as lattice shape, and holes that are communicated with the slits and receiving the mold material are formed at the other surface of the mold base.
  • at least one corner portion among the corner portions of the intersection points at which the slits cross and which will be the outlet cells from which the fluid flows out, or be the outlet cells and the inlet cells into which the fluid flows may have a curved shape or chamfered shape.
  • the reinforced parts may be formed at target positions when forming the honeycomb.
  • recess portions or beams for reinforcing the corner portions of the outlet cells, or the corner portions of the outlet cells and the inlet cells may be mounted at the intersection points of the slits in the mold.
  • the shape of the molded article of the honeycomb is not limited, but may be a cylindrical shape (circular cylindrical shape) or a pillar shape, a cross-section vertical to a center axis of which is an oval shape, a racetrack shape, and a polygonal shape such as triangle, quadrangle, pentagon, hexagon, octagon, and so on.
  • the shape of the molded article of the honeycomb may preferably be a pillar shape, a cross-section vertical to the center axis of which is a polygonal shape such as triangle, quadrangle, pentagon, hexagon, octagon, and so on.
  • the molded article of the honeycomb obtained in the forming process may be dried. Drying method is not limited, but may be, for example, hot-air drying, microwave drying, dielectric drying, reduced pressure drying, vacuum drying, lyophilization, and so on. Particularly, the dielectric drying, the microwave drying or the hot-air drying may preferably be used solely or in combined fashion.
  • the honeycomb structure may be obtained by burning the molded article of the honeycomb.
  • the burning of the molded article of the honeycomb may be done after the sealing portions are mounted at the molded article of the honeycomb.
  • the molded article of the honeycomb may be calcined before the molded article of the honeycomb is burnt (main burning).
  • the calcination is performed for cleaning.
  • the calcination method is not limited, but it is enough to remove an organic material (organic binder, a dispersing agent, pore-forming material, and so on) adhered to or contained in the molded article during the calcination. Because combustion temperature of the organic binder is about 100 to 300°C and combustion temperature of the pore-forming material is about 200 to 800°C in general, the calcinations is performed for 3 to 100 hours at about 200 to 1000°C under oxidizing atmosphere.
  • the burning (main burning) of the molded article of the honeycomb is performed so as to sinter the mold material consisting of the calcined molded article.
  • the mold material may become dense and predetermined strength may be secured.
  • Burning condition (temperature, time, and atmosphere) may change depending on the mold material, and thus may be selected according to the mold material suitably.
  • burning temperature may preferably be about 1410 to 1440°C.
  • burning time means time for which maximum temperature is maintained and may be about 4 to 6 hours.
  • the reinforcing material of concave type of beam type are mounted at the corner portions of the outlet cells, or the outlet cells and the inlet cells before or after the burning. Thereby, the reinforced parts are formed.
  • the reinforced parts are formed at the corner portions of the outlet cells.
  • the reinforced parts may be formed by dipping method. According to the dipping method, the sealed honeycomb structure before or after the burning is dipped from the end surface of the outlet side into the reinforcing material of slurry type contained in any container.
  • the reinforced parts may be formed by sucking method. According to the sucking method, the reinforcing material is sucked from the end surface of the inlet side of the sealed honeycomb structure in a state that the end surface of the outlet side of the sealed honeycomb structure is contacted with the reinforcing material of slurry type.
  • the reinforced parts may be formed by injection method.
  • the reinforcing material of slurry type is injected into the end surface of the outlet side of the sealed honeycomb structure.
  • a particle diameter of the reinforcing material may be larger than the average pore diameter of the walls of the honeycomb structure to prevent impregnation of the reinforcing material into the inlet cells.
  • forming the reinforced parts at the corner portions of the outlet cells and the inlet cells is similar to the forming the reinforced parts at the corner portions of the outlet cells.
  • thermal expansion coefficient of the reinforcing material may be the same as that of the sealed honeycomb structure to prevent breakage of the reinforcing material or the honeycomb structure in actual applications.
  • the honeycomb structure where the reinforced parts are formed at at least one corner portion of the cells at which the walls on the cross-section vertical to the extending direction of the cells which will be the outlet cells cross each other, or where the reinforced parts are formed at the corner portions of the outlet cells, the reinforced parts for reinforcing the inlet cells are formed at at least one corner portion of the cells at which the walls on the cross-section vertical to the extending direction of the cells which will be the inlet cells cross each other, and the number of the corner portions reinforcing the inlet cell is smaller than the number of the corner portions reinforcing the outlet cell can be obtained.
  • the sealing portions are formed at the openings of the outlet cells at the end surface of the inlet side and the openings of the inlet cells at the end surface of the outlet side by filling sealing material in the openings of the outlet cells at the end surface of the inlet side and the openings of the inlet cells at the end surface of the outlet side in the honeycomb structure.
  • the sealing material When filling the sealing material in the honeycomb structure, the sealing material is firstly filled in an end portion of one side. After that, the sealing material is filled in an end portion of the other side.
  • One exemplary method of filling the sealing material in the end portion of the one side includes making process where a sheet is attached to the end surface of the one side (for example, the end surface of the inlet side) of the honeycomb structure and holes are bored at positions of the sheet overlapping the "cells where the sealing portions are formed", and press-fit process where "the end portion of the honeycomb structure where the sheet is attached” is pressed in the container in which the sealing material is stored such that the sealing material is press-fitted into the cells of the honeycomb structure.
  • the sealing material passes through the holes formed in the sheet and is filled in only the cells communicating with the holes formed in the sheet.
  • a method of filling the sealing material in the end portion of the other side (for example, the end surface of the outlet side) of the honeycomb structure may be the same as the method of filling the sealing material in the end portion of the one side of the honeycomb structure.
  • the sealing material may be simultaneously filled in the both end portions of the honeycomb structure.
  • the sealing material filled in the honeycomb structure is dried to form the sealing portions, and thereby the sealed honeycomb structure may be obtained.
  • the sealing material may be dried, or after the sealing material filled in the end portion of one side of the honeycomb structure is dried, the sealing material is filled in the end portion of the other side and then is dried. Further, the sealing material may be burnt in order to fix the sealing material strongly.
  • the sealing material may be filled in the molded article of the honeycomb before or after dried, and the sealing material together with the molded article of the honeycomb before or after dried may be burnt.
  • the sealed honeycomb structure of the present exemplary embodiment can be manufactured.
  • a method of manufacturing the sealed honeycomb structure of the present exemplary embodiment is not limited to the above-described method. That is, the sealed honeycomb structure including at least one cell among the outlet cells being the reinforced cell where the reinforced part for reinforcing the outlet cell is formed at at least one corner portion at which the walls on the cross-section vertical to the extending direction of the cell cross each other, the inlet cell where the reinforced part for reinforcing the inlet cell is formed at at least one corner portion at which the walls on the cross-section vertical to the extending direction of the cell cross each other, wherein the number of the corner portions reinforcing the inlet cells is smaller than the number of the corner portions reinforcing the outlet cells can be manufactured by using any method other than the above-described method.
  • Example 13 is according to the invention.
  • Cordierite material (alumina, talc, and kaolin) is used as the ceramic material. Mass ratio of alumina, talc, and kaolin is a mass ratio obtained after burning. Ceramic mold material is obtained by mixing the ceramic material with the binder (methylcellulose) and water. The obtained ceramic mold material is kneaded by using the kneader so as to obtain the body.
  • the molded article of the honeycomb is formed by molding the body by means of a vacuum extruder.
  • Wall thickness is 0.305mm
  • cell density is 46.5 cell/cm2
  • cell pitch is 1.47mm in the honeycomb structure obtained by burning the molded article of the honeycomb.
  • entire shape (entire shape after burning) of the molded article of the honeycomb is cylindrical (diameter of the end surface is 143.8mm, and a length in the extending direction of the cell is 152.4mm).
  • the entire shape of the molded article of the honeycomb is integrally formed (monolithic structure), and this honeycomb structure is represented by a "monolith” in "structure of honeycomb structure” column of Table 1.
  • the reinforced part is formed at the corner portion where the walls of the outlet cells cross according to the molded article of the honeycomb.
  • the cell (outlet cell) in which the reinforced part is formed and the cell (inlet cell) in which the reinforced part is not formed are disposed alternately across the wall.
  • the ratio of "the intersecting distance L of the intersecting part of the walls that is the distance from the surface of the reinforced part of the outlet cell to the surface of another cell disposed across the intersecting point of the walls dividedly forming the outlet cells" to the "average thickness T of the wall except the reinforced part" (hereinafter, it will be called an "intersection ratio of the outlet cell (L/T)" is 2.0.
  • the ratio of the "intersecting distance L of the intersecting part of the walls that is the distance from the surface of the inlet cell to the surface of anther cell disposed across the intersecting point of the walls dividedly forming the inlet cells" to the "average thickness T of the wall except the reinforced part” (hereinafter, it will be called “intersection ratio of the inlet cell (L/T)") is 1.4.
  • the intersection ratio (L/T) is measured by the above-described measuring method explained using FIG. 7 .
  • the sealed molded article of the honeycomb is heated for 5 hours at 450°C for performing the cleaning, and is heated for 7 hours at 1425°C for performing the burning. Thereby, the sealed honeycomb structure is obtained.
  • a “maximum principal stress (MPa)”, a “soot mass limit (SML)”, an “opening ratio of inlet (%)”, a “pressure loss (kPa)”, a “filter mass (g)”, and a “time for reaching 650°C (sec)” in the obtained sealed honeycomb structure are detected by following methods. The measured results are shown in Table 2.
  • Geometry of the sealed honeycomb structure is constructed by a CAD model and the maximum principal stress of the constructed model is calculated by finite element analysis software (brand name: ANSYS Release 11.0) manufactured by ANSYS INC. (Japan).
  • geometric parameters of the model are the "thickness of the wall", a “cell density”, a “cell pitch”, a “diameter of a bottom surface”, a “length of the cell in the extending direction”, the “intersection ratio of the inlet cell or the outlet cell”, a “sealing length”, and a “thickness of the external wall”, and "Young's modulus”, “Poisson's ratio”, and "thermal expansion coefficient" of the honeycomb structure detected in advance and temperature distribution occurring in the sealed honeycomb structure that is obtained by combustion test of the soot performed in advance are used in the finite element method. Thereby, the maximum principal stress can be obtained.
  • the sealed honeycomb structure is used as a DPF. Soot accumulation amount is increased so as to perform combustion of the soot, and thereby soot mass limit where crack occurring is detected.
  • a non-thermally expandable ceramic mat that is holding material is wrapped on the external circumference of the obtained sealed honeycomb structure, and the sealed honeycomb structure is inserted into a canning body of stainless steel (SUS 409) so as to make a canning structure.
  • combustion gas containing the soot generated by burning the diesel fuel is flowed into one end surface (an end surface including one end surface of a short segment) of the honeycomb structure, and is flowed out from the other end surface so as to deposit the soot in the honeycomb structure.
  • the combustion gas of 680°C is flowed into the one end surface of the honeycomb structure and the soot is burnt.
  • flow amount of the combustion gas is reduced so as to burn the soot quickly.
  • whether crack occurs in the sealed honeycomb structure is detected.
  • This test begins when the soot accumulation amount reaches 4g per 1 liter (hereinafter, it will be represented by 4g/l) in the honeycomb structure, and is repetitively performed by increasing the soot accumulation amount by 0.5 (g/l) until it is detected that the crack occurs. Soot amount (g/l) when the crack occurs is represented by the SML.
  • a ratio of an area of the inlet cells at an end portion of the inlet side to a cross-sectional area of the sealed honeycomb structure is detected.
  • the area ratio (%) is represented by an opening ratio of an inlet (%).
  • the pressure loss of the sealed honeycomb structure is detected by using an "apparatus of detecting pressure loss of a filter" disclosed in Japanese
  • Patent Laid-Open Publication No. 2005-172652 Flow amount of fluid is 10Nm 3 /min, and fluid temperature when doing experiments is 25°C.
  • a mass of the sealed honeycomb structure of each example is detected.
  • the mass is represented by a filter mass (g).
  • the sealed honeycomb structure is used as the DPF.
  • the combustion gas of 680°C is flowed into the DPF, and a time necessary for an end portion of the outlet side of the DPF to reach 650°C is detected.
  • a non-thermally expandable ceramic mat that is holding material is wrapped on the external circumference of the obtained sealed honeycomb structure, and the sealed honeycomb structure is inserted into a canning body of stainless steel (SUS 409) so as to make a canning structure.
  • a K-type sheathed thermocouple is mounted at an end portion of the outlet side of the canning structure.
  • thermocouple that is mounted in advance is monitored, and the time for the temperature of the thermocouple to reach 650°C (time for reaching 650°C (sec)) is detected.
  • Example1 monolith Non-exist Exist 1.4 2.0 0.305 1.47
  • Example2 monolith Non-exist Exist 1.4 2.0 0.305 1.80
  • Example3 monolith Non-exist Exist 1.4 2.0 0.305 2.54
  • Example4 monolith Non-exist Exist 1.4 2.7 0.127 1.47
  • Example5 monolith Non-exist Exist 1.4 2.7 0.127 2.54
  • Example6 monolith Non-exist Exist 1.4 1.7 0.508 1.47
  • Example7 monolith Non-exist Exist 1.4 1.7 0.508 2.54
  • Example8 segment Non-exist Exist 1.4 2.0 0.305 1.47
  • Example9 monolith Non-exist Exist 1.4 1.5 0.508 2.54
  • Example10 monolith Non-exist Exist 1.4 9.3 0.127 2.54
  • Example11 monolith Non-exist Exist 1.4 9.4 0.127 2.54
  • Example12 monolith Non-exist Exist 1.4 1.6 0.305 1.47
  • Example13 monolith Partially exist,
  • the sealed honeycomb structure is manufactured by the same method manufacturing Example 1 except that the wall thickness, the cell pitch and the cell where the reinforced part is formed (whether the reinforced part exists or not) in the honeycomb structure are changed as shown in Table 1, and the intersection ratio (L/T) of the inlet cell and the intersection ratio (L/T) of the outlet cell are changed as shown in Table 1.
  • Example 13 shows that the reinforced parts are formed at a part of the outlet cells and the inlet cells.
  • SMLs small mass limits
  • Carbonization silicon is used as the ceramic material so as to manufacture the honeycomb segment, and the honeycomb structure of segment type is manufactured by bonding sixteenth honeycomb segments.
  • SiC powder and Si metal power are mixed in a mass ratio of 80:20, and methyl cellulose and hydroxypropoxy methylcellulose as the binder, starch and water-absorbent resin as the pore-forming material, surfactant and water are mixed to the mixture of SiC powder and Si metal power such that the ceramic mold material is obtained.
  • the obtained ceramic mold material is kneaded by using kneader such that the body is obtained.
  • the molded article of honeycomb is formed by molding the body by means of the vacuum extruder.
  • the wall thickness of the molded article of the honeycomb is 305 ⁇ m
  • the cell density of the molded article of the honeycomb is 46.5 cell /cm2
  • the cell pitch of the molded article of the honeycomb is 1.47mm in the honeycomb structure.
  • cross-sectional shape vertical to the extending direction of the cell is square, a side of which is 36mm, and a length in the extending direction of the cell is 152.4mm in the entire shape (entire shape after burning) of the molded article of the honeycomb.
  • the reinforced part is formed at the corner portion where the walls of the outlet cells cross according to the molded article of the honeycomb.
  • the cell (outlet cell) in which the reinforced part is formed and the cell (inlet cell) in which the reinforced part is not formed are disposed alternately across the wall.
  • the ratio of "the intersecting distance L of the intersecting part of the walls that is the distance from the surface of the reinforced part of the outlet cell to the surface of another cell disposed across the intersecting point of the walls dividedly forming the outlet cells" to the "average thickness T of the wall except the reinforced part" (hereinafter, it will be called an "intersection ratio of the outlet cell (L/T)" is 2.0.
  • the ratio of the "intersecting distance L of the intersecting part of the walls that is the distance from the surface of the inlet cell to the surface of anther cell disposed across the intersecting point of the walls dividedly forming the inlet cells" to the "average thickness T of the wall except the reinforced part” (hereinafter, it will be called “intersection ratio of the inlet cell (L/T)") is 1.4.
  • the sealing portion is formed at the molded article of the honeycomb by the same method as the Example 1.
  • the cleaning is performed on the sealed molded article of the honeycomb, and the burning is performed by burning the sealed molded article of the honeycomb at 1410 to 1440°C for 15 hours. Thereby, a burnt body of the sealed honeycomb (honeycomb segment) is obtained.
  • burnt bodies of the sealed honeycomb are bonded by glue in a state that the burnt bodies are closely disposed with their sides facing each other. Thereby, a bonded body is formed.
  • the end surface of the inlet side of the burnt body of the sealed honeycomb and the end surface of the inlet side of another burnt body of the sealed honeycomb are aligned in one direction, and then the burnt bodies of the sealed honeycomb are bonded.
  • a mixture of SiC particle and colloid silica is used as the glue for forming the bonded body.
  • the bonded body is grinded such that external configuration of the bonded body has cylindrical shape.
  • coating material is sprayed on the outmost circumference of the grinded bonded body, and is dried and hardened for 2 hours at 700°C.
  • the sealed honeycomb structure is obtained.
  • Coating material is the same as the bonding material.
  • a diameter of a bottom surface is 143.8mm and a length of the cell in the extending direction is 152.4mm in the obtained honeycomb structure.
  • the sealed honeycomb structure of segment type of Example 8 is represented by "segment" in the "structure of honeycomb structure” column of Table 1. The same tests as Example 1 are performed on the sealed honeycomb structure. The results are shown in Table 2.
  • the sealed honeycomb structure is manufactured by the same method manufacturing Example 8 except that the wall thickness, the cell pitch and the cell where the reinforced part is formed in the honeycomb structure are changed as shown in Table 1, and the intersection ratio (L/T) of the inlet cell and the intersection ratio (L/T) of the outlet cell are changed as shown in Table 1.
  • Example 1 The same tests as Example 1 are done on the obtained sealed honeycomb structure. The results are shown in Table 2.
  • "exist” in Table 1 without a specific value indicates that the reinforced parts are formed at all the corner portions of Examples and Comparative Examples
  • “non-exist” in Table 1 without a specific value indicates that the reinforced parts are not formed at all the corner portions of Examples and Comparative Examples.
  • the sealed honeycomb structures of Example 1 to 13 have small maximum principal stress and excellent durability.
  • durability is deteriorated a little but pressure loss is greatly reduced in Example 1 having the same cell pitch as Comparative Example 3.
  • Durability is so improved that there is no practical problem when using the sealed honeycomb structure of Example 1 and increase of the pressure loss may be greatly suppressed.
  • suppression of increase of the pressure loss in Comparative Example 2 where the reinforced parts are formed at the inlet cells is substantially the same as that in the Example 1, but the opening ratio of the inlet is deteriorated due to the reinforced parts formed at the inlet cells.
  • intersection ratio (L/T) of the outlet cell is within 1.5 to 9.3 (for example, the intersection ratio (L/T) of the outlet cell in Example 10 is 9.3), improvement of durability and suppression of increase of the pressure loss are balanced. If the intersection ratio (L/T) of the outlet cell is greater than the above-described range, suppression of increase of the pressure loss is reduced a little. Particularly, if the intersection ratio (L/T) of the outlet cell is smaller than or equal to 9.3, durability may be sufficiently improved and increase of the pressure loss may be suppressed favorably.
  • the sealed honeycomb structure of the present invention can be used as a filter for purifying gas exhausted from an internal combustion engine such as a diesel engine or various combustion devices.
  • wall 2 cell 2a: inlet cell 2b: outlet cell 3: external wall 4: honeycomb structure 5a: inlet side sealing portion 5b: outlet side sealing portion 6, 6x: reinforced part 7: fence 8: honeycomb segment 11: end surface of inlet side 12: end surface of outlet side 21, 21a: corner portion 22: reinforced cell 23: non-reinforced cell 100
  • 110, 120 sealed honeycomb structure
  • E, F, G, H intersection point L: intersecting distance of intersecting part of walls
  • T average thickness of wall
  • P diagonal (extending line of diagonal)
  • Q R: line

Claims (5)

  1. Structure étanche en nid d'abeilles (100) comprenant :
    une structure en nid d'abeilles (4) ayant des parois poreuses (1) formant, par division, une pluralité d'alvéoles (2) s'étendant à partir d'une surface d'extrémité (11) d'un côté d'entrée jusqu'à une surface d'extrémité (12) d'un côté de sortie, la pluralité d'alvéoles étant une pluralité de canaux de fluide ;
    une partie d'étanchéité du côté de la sortie (5b) montée au niveau des ouvertures des alvéoles prédéterminées dans la surface d'extrémité (12) du côté de la sortie afin de former des alvéoles d'entrée (2a) où la surface d'extrémité (11) du côté de l'entrée est ouverte et la surface d'extrémité (12) du côté la de sortie est scellée ; et
    une partie d'étanchéité du côté de l'entrée (5a) montée au niveau des ouvertures des alvéoles résiduelles dans la surface d'extrémité (11) du côté de l'entrée afin de former des alvéoles de sortie (2b) où la surface d'extrémité (12) du côté de la sortie est ouverte et la surface d'extrémité (11) du côté de l'entrée est scellée,
    dans laquelle au moins une alvéole parmi les alvéoles de sortie (2b) est une alvéole renforcée où une partie renforcée (6) pour renforcer l'alvéole de sortie est formée au niveau d'au moins une partie de coin (21) au niveau de laquelle les parois sur une section transversale verticale à une direction d'extension de l'alvéole se croisent,
    caractérisée en ce que :
    l'alvéole d'entrée (2a) est prévue avec une partie renforcée (6) pour renforcer l'alvéole d'entrée au niveau d'au moins une partie de coin (21) au niveau de laquelle les parois sur la section transversale verticale par rapport à la direction d'extension de l'alvéole se croisent, et
    dans laquelle le nombre de parties de coin (21) renforçant l'alvéole d'entrée (2a) est inférieur au nombre de parties de coin (21) renforçant l'alvéole de sortie (2b),
    dans laquelle l'alvéole renforcée comprend une partie de coin renforcée au niveau de laquelle la partie renforcée (6) est formée et une partie de coin non renforcée au niveau de laquelle la partie renforcée n'est pas formée.
  2. Structure étanche en nid d'abeilles selon la revendication 1, dans laquelle l'alvéole d'entrée (2a) et l'alvéole de sortie (2b) sont disposées de manière alternée de part et d'autre de la paroi.
  3. Structure étanche en nid d'abeilles selon la revendication 1 ou la revendication 2, dans laquelle une forme d'ouverture de l'alvéole d'entrée (2a) sur la section transversale verticale par rapport à la direction d'extension de l'alvéole est la même qu'une forme d'ouverture de l'alvéole de sortie (2b) sans la partie renforcée (6) sur la section transversale verticale par rapport à la direction d'extension de l'alvéole.
  4. Structure étanche en nid d'abeilles selon l'une quelconque des revendications 1 à 3, dans laquelle, dans les alvéoles de sortie (2b), un rapport d'une distance d'intersection d'une partie d'intersection des parois sur une épaisseur moyenne de la paroi sans la partie renforcée est dans une plage de 1,5 à 9,3, et
    dans laquelle la distance d'intersection de la partie d'intersection des parois est une distance allant d'une surface de la partie renforcée d'une première alvéole renforcée jusqu'à une surface d'une autre alvéole disposée de part et d'autre d'un point d'intersection des parois formant, par division, les alvéoles renforcées.
  5. Structure étanche en nid d'abeilles selon l'une quelconque des revendications 1 à 4, dans laquelle chaque partie renforcée (6) occupe de 0,05 à 20% d'une zone d'une partie d'ouverture sans la partie renforcée sur la section transversale verticale par rapport à la direction d'extension de l'alvéole.
EP12765116.4A 2011-03-31 2012-03-30 Structure étanche en nid d'abeilles Active EP2692407B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011078690 2011-03-31
PCT/JP2012/058726 WO2012133846A1 (fr) 2011-03-31 2012-03-30 Structure étanche en nid d'abeilles

Publications (3)

Publication Number Publication Date
EP2692407A1 EP2692407A1 (fr) 2014-02-05
EP2692407A4 EP2692407A4 (fr) 2015-01-21
EP2692407B1 true EP2692407B1 (fr) 2020-05-27

Family

ID=46931539

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12765116.4A Active EP2692407B1 (fr) 2011-03-31 2012-03-30 Structure étanche en nid d'abeilles

Country Status (6)

Country Link
US (2) US20140127453A1 (fr)
EP (1) EP2692407B1 (fr)
JP (1) JP5916713B2 (fr)
KR (1) KR101575334B1 (fr)
CN (1) CN103458989B (fr)
WO (1) WO2012133846A1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9028741B1 (en) * 2013-03-15 2015-05-12 Ibiden Co., Ltd. Method for manufacturing aluminum-titanate-based ceramic honeycomb structure
JP6385295B2 (ja) * 2015-02-25 2018-09-05 日本碍子株式会社 ハニカム構造体
KR101916049B1 (ko) * 2015-12-14 2018-11-07 현대자동차 주식회사 촉매가 코팅된 매연 필터
JP6802096B2 (ja) * 2017-03-14 2020-12-16 日本碍子株式会社 目封止ハニカム構造体
JP2018167200A (ja) * 2017-03-30 2018-11-01 日本碍子株式会社 ハニカムフィルタ
JP6809963B2 (ja) * 2017-03-30 2021-01-06 日本碍子株式会社 ハニカム構造体
JP6862245B2 (ja) * 2017-03-30 2021-04-21 日本碍子株式会社 ハニカムフィルタ
JP6887302B2 (ja) * 2017-05-12 2021-06-16 日本碍子株式会社 ハニカムフィルタ
US11285468B2 (en) * 2017-11-24 2022-03-29 Ngk Insulators, Ltd. Honeycomb structure
CN108590822A (zh) * 2017-12-27 2018-09-28 山东国瓷功能材料股份有限公司 一种蜂窝陶瓷增强结构
JP7323987B2 (ja) * 2018-03-27 2023-08-09 日本碍子株式会社 ハニカムフィルタ
WO2019213569A1 (fr) 2018-05-04 2019-11-07 Corning Incorporated Structures en nid d'abeilles à haute résistance isostatique et ses filières d'extrusion
JP7340544B2 (ja) * 2018-05-31 2023-09-07 コーニング インコーポレイテッド 三角形のセル状ハニカム構造を有するハニカム体及びその製造方法
EP3845352A4 (fr) * 2018-08-30 2022-06-22 Hitachi Metals, Ltd. Corps structurel en nid d'abeilles en céramique et matrice de moulage en nid d'abeilles
JP7160741B2 (ja) 2019-03-28 2022-10-25 日本碍子株式会社 ハニカム構造体

Family Cites Families (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4335023A (en) 1980-01-24 1982-06-15 Engelhard Corporation Monolithic catalyst member and support therefor
JPS56129042A (en) 1980-03-14 1981-10-08 Ngk Insulators Ltd Honeycomb structure of ceramic
JPS63185425A (ja) 1987-01-28 1988-08-01 Ngk Insulators Ltd 排ガス浄化用セラミツクハニカムフイルタ
US5396764A (en) 1994-02-14 1995-03-14 Ford Motor Company Spark ignition engine exhaust system
JP3389851B2 (ja) 1997-01-21 2003-03-24 トヨタ自動車株式会社 排ガス浄化用触媒
JPH10264125A (ja) 1997-03-28 1998-10-06 Ngk Insulators Ltd セラミックハニカム構造体
JP4161292B2 (ja) * 2002-03-13 2008-10-08 日立金属株式会社 セラミックハニカム構造体
ATE372449T1 (de) 2001-12-03 2007-09-15 Hitachi Metals Ltd Keramischer wabenfilter
EP1502640B1 (fr) 2002-09-13 2013-03-20 Ibiden Co., Ltd. Structure en nid d'abeille
JP4285096B2 (ja) 2003-06-16 2009-06-24 株式会社デンソー 内燃機関の排ガス浄化装置
JP4307974B2 (ja) 2003-12-12 2009-08-05 日本碍子株式会社 フィルタの圧力損失測定装置
JP4673084B2 (ja) 2004-02-26 2011-04-20 日本碍子株式会社 ハニカムフィルタ及び排ガス処理装置
US7393377B2 (en) * 2004-02-26 2008-07-01 Ngk Insulators, Ltd. Honeycomb filter and exhaust gas treatment apparatus
US20080128082A1 (en) 2004-12-08 2008-06-05 Ngk Insulators, Ltd Method for Manufacturing Plugged Honeycomb Structure
WO2007058007A1 (fr) 2005-11-18 2007-05-24 Ibiden Co., Ltd. Structure en nid d'abeilles
JP4709002B2 (ja) 2005-12-27 2011-06-22 株式会社デンソー 六角セルハニカム構造体
JP5006064B2 (ja) * 2006-03-29 2012-08-22 日本碍子株式会社 ハニカム構造体
US7674513B2 (en) 2006-03-31 2010-03-09 Corning Incorporated Crack-resistant ceramic honeycomb structures
US7722827B2 (en) 2006-03-31 2010-05-25 Corning Incorporated Catalytic flow-through fast light off ceramic substrate and method of manufacture
JP2008129042A (ja) 2006-11-16 2008-06-05 Pentax Corp ファインダー装置
MY151327A (en) 2007-01-31 2014-05-15 Basf Catalysts Llc Gas catalysts comprising porous wall honeycombs
WO2009101682A1 (fr) * 2008-02-13 2009-08-20 Ibiden Co., Ltd. Structure en nid d'abeilles, appareil de purification de gaz d'échappement et processus de production d'une structure en nid d'abeilles
US8276371B2 (en) 2008-06-06 2012-10-02 Caterpillar Inc. Exhaust system having exhaust system segment with improved catalyst distribution and method
JP2010000427A (ja) 2008-06-19 2010-01-07 Denso Corp ハニカム構造体及びその製造方法
JP4947113B2 (ja) * 2008-11-06 2012-06-06 株式会社デンソー ハニカムフィルタ及びその製造方法
JP5188433B2 (ja) * 2009-03-24 2013-04-24 日本碍子株式会社 ハニカムフィルタ
JP5456353B2 (ja) 2009-03-31 2014-03-26 日本碍子株式会社 ハニカムフィルタ
US8246922B2 (en) 2009-10-02 2012-08-21 Basf Corporation Four-way diesel catalysts and methods of use
CN102470310B (zh) * 2009-10-08 2014-07-23 揖斐电株式会社 废气净化装置和废气净化方法
EP2368619B1 (fr) 2010-03-26 2014-06-25 Imerys Structures de céramique en nid d'abeille
WO2011125768A1 (fr) 2010-03-31 2011-10-13 日本碍子株式会社 Filtre en nid d'abeilles
EP2692406B1 (fr) 2011-03-31 2020-06-03 NGK Insulators, Ltd. Structure étanche en nid d'abeilles, et dispositif de purification des gaz d'échappement
JP6068067B2 (ja) 2012-09-06 2017-01-25 日本碍子株式会社 目封止ハニカム構造体

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP2692407A1 (fr) 2014-02-05
JPWO2012133846A1 (ja) 2014-07-28
KR101575334B1 (ko) 2015-12-08
CN103458989A (zh) 2013-12-18
EP2692407A4 (fr) 2015-01-21
WO2012133846A1 (fr) 2012-10-04
US10300423B2 (en) 2019-05-28
CN103458989B (zh) 2015-12-09
US20160375395A1 (en) 2016-12-29
US20140127453A1 (en) 2014-05-08
JP5916713B2 (ja) 2016-05-11
KR20130135929A (ko) 2013-12-11

Similar Documents

Publication Publication Date Title
EP2692408B1 (fr) Structure étanche en nid d'abeilles
EP2692407B1 (fr) Structure étanche en nid d'abeilles
EP2692406B1 (fr) Structure étanche en nid d'abeilles, et dispositif de purification des gaz d'échappement
US9080484B2 (en) Wall flow type exhaust gas purification filter
JP6068067B2 (ja) 目封止ハニカム構造体
US8039415B2 (en) Honeycomb structure
EP2565408B1 (fr) Filtre de purification de gaz d'échappement de type à écoulement sur paroi
US20070128405A1 (en) Honeycomb structured body, method for manufacturing honeycomb structured body and exhaust gas purifying device
JP6110750B2 (ja) 目封止ハニカム構造体
EP2221099B1 (fr) Structure en nid d'abeille
EP2514503B1 (fr) Structure en nid d'abeille raccordée
EP2505254B1 (fr) Structure en nid d'abeille raccordée
US20210292248A1 (en) Honeycomb structure
EP2508242B1 (fr) Structure en nid d'abeille raccordée
JP2013202528A (ja) ハニカムフィルタ

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20131011

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAX Request for extension of the european patent (deleted)
A4 Supplementary search report drawn up and despatched

Effective date: 20141219

RIC1 Information provided on ipc code assigned before grant

Ipc: B01D 46/24 20060101ALI20141215BHEP

Ipc: B01D 46/00 20060101ALI20141215BHEP

Ipc: F01N 3/28 20060101ALI20141215BHEP

Ipc: B01D 39/20 20060101AFI20141215BHEP

Ipc: C04B 38/00 20060101ALI20141215BHEP

Ipc: C04B 111/00 20060101ALI20141215BHEP

Ipc: F01N 3/022 20060101ALI20141215BHEP

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20180531

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20200130

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602012070347

Country of ref document: DE

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1273943

Country of ref document: AT

Kind code of ref document: T

Effective date: 20200615

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200927

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200928

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200527

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200527

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200827

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200527

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200828

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20200527

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200827

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200527

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200527

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200527

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 1273943

Country of ref document: AT

Kind code of ref document: T

Effective date: 20200527

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200527

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200527

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200527

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200527

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200527

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200527

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200527

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200527

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200527

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200527

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200527

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200527

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602012070347

Country of ref document: DE

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20210302

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200527

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200527

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20210331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210331

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210330

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210331

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210330

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210331

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20230221

Year of fee payment: 12

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20120330

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200527

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20230220

Year of fee payment: 12

Ref country code: DE

Payment date: 20230220

Year of fee payment: 12

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230530